What is the acceleration of 200kg mass when a net force of 100 N acts on it
1 answer:
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The dashed line represents the<u> normal </u>to the boundary
Explanation:
Refraction is a phenomenon that occurs when a ray of light crosses the interface between two mediums.
When this occurs, the ray of light changes direction and speed.
The new direction of the ray of light is given by Snell's law:
where
is the index of refraction of the 1st medium
is the index of refraction of thre 2nd medium
is the angle of incidence, which is the angle between the direction of the incident ray and the normal to the boundary
is the angle of refraction, which is the angle between the direction of the refracted ray and the normal to the boundary
The index of refraction of a medium is the ratio between the speed of light in a vacuum (c) and the speed of light in that medium (v):
The figure in the question is missing, however you can find it in attachment.
We see that the dashed line is perpendicualr to the boundary between the two mediums, so it represents the normal.
So, the correct answer is
Normal
We note that in this case the ray of light bends towards the normal, this means that , therefore the second medium has a larger index of refraction (
).
Learn more about refraction:
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Answer:
x = 1474.9 [m]
Explanation:
To solve this problem we must use Newton's second law, which tells us that the sum of forces must be equal to the product of mass by acceleration.
We must understand that when forces are applied on the body, they tend to slow the body down to stop it.
So as the body continues to move to the left, it is slowing down. Therefore we must calculate this deceleration value using Newton's second law. We must perform a sum of forces on the x-axis equal to the product of mass by acceleration. With leftward movement as negative and rightward forces as positive.
ΣF = m*a
Now using the following equation of kinematics, we can calculate the distance of the block, before stopping completely. The initial speed must be 100 [m/s].
where:
Vf = final velocity = 0 (the block stops)
Vo = initial velocity = 100 [m/s]
a = - 3.39 [m/s²]
x = displacement [m]